[Devel] [PATCH RH7] fs/fuse kio: adjust rdma connection parameters

[Kui Liu]

In RoCE network, packet loss and dealy due to congestion can happen
quite often. We need to tolerate such event. So increase retry_count
and rnr_retry_count to 7 to allow NIC to retry operations when an
error happens, instead of returning the error directly which causes
the connection to be aborted.

Signed-off-by: Liu Kui <Kui.Liu at acronis.com>
---
fs/fuse/kio/pcs/pcs_rdma_conn.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/fuse/kio/pcs/pcs_rdma_conn.c b/fs/fuse/kio/pcs/pcs_rdma_conn.c
index 4db903151de0..7339b1466d3a 100644
--- a/fs/fuse/kio/pcs/pcs_rdma_conn.c
+++ b/fs/fuse/kio/pcs/pcs_rdma_conn.c
@@ -44,8 +44,8 @@ conn_param_init(struct rdma_conn_param *cp, struct pcs_rdmaio_conn_req *cr,
               cp->initiator_depth     = min_t(int, U8_MAX, cmid->device->attrs.max_qp_init_rd_atom);

               cp->flow_control        = 1; /* does not matter */
-               cp->retry_count         = 0; /* # retransmissions when no ACK received */
-               cp->rnr_retry_count     = 0; /* # RNR retransmissions */
+              cp->retry_count         = 7; /* # retransmissions when no ACK received */
+              cp->rnr_retry_count     = 7; /* # RNR retransmissions */
}

static int pcs_rdma_cm_event_handler(struct rdma_cm_id *cmid,
--
2.32.0 (Apple Git-132)
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